Dust guard for shock absorbers



Oct. 13, 1925- H. H. LOGAN DUST GUARD FOR SHOCK ABSORBERS Filed Jan. 11. 1924 ATTORNEYS Patented Oct. 13, 1925. v

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' To ZZZ whom it may concern Be it known that I, HENRY Htv'mom Looms, a citizen "oi": Great Britain (who has dust guard for shock absorber, snubbers,

and the like, andit consists the combinations, constructions, and arrangements herein described and claimed. 1 j t p An object of my invention is to provide a dust and mud guard ior use Withth'e tra I'm-y type of shock "absorber er snubb'er, by

means of which the presence of -dust and other extraneous substances in the working parts of the shock absorber is 'entirelyexch ded,- I

- A further objectlof my invention is to provide a, dust and mud "guard of the type described which is telescopic in structure so that it"m'ay in length as and "aide housings of the vehicle move tow ard or away from one another.

A further object of .my invention is to provide adust and mud guard of the type which may be easily attached to the ordinary type of shock absorber without the necessity of reconstructing the shock absorber, and which is compact in form, durable, and thoroughly practical commercially.

Other objects and advantages will appear in the following specification, and the novel features of the invention will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawings forming part of this application, in which Figure 1 is a perspective view of an embodiment of my invention,

Figure 2 is a perspective view of a modified form of my invention, and

Figure 3 is a perspective View of another modified form of my invention.

In carrying out my invention, I make use of the ordinary type of shock absorber or snubber consisting in a housing 1 which is secured directly to the chassis of the motor vehicle by means of bolts 2 projected through the housing and secured to the frame of the chassis, (not shown).

A rubric strap a of wear resisting material is wound about a spring actuated drumdis posedwithin the casing 1 andthe eutere'nd thereof projected through an opening "4 in the casing 1. The extremeouter end of the strap 3 is'wound about 'thegaxle housing 5 ott'h'e motor vehicle and clamped against movement to the adjacent 'po'rtionof the "strap by means ota clamping member 6 having bolts 7 which when tightened secure the adjacent parts of the strap 3 against movement relative "to one another;

This type er shock absbrber or siiu'bber is well known in the art and I therefore deem it unnecessary to describe indetail the particular mechanism empleyed for resist- ;ing the outward movement er the strap 3 through the opening 4 anditor permitting the free movement of the-strap s iswardi through theopeiiing 4 and about are drum in thecasin'g Y My present invention involves the previson of a cap 8 secured to the outer portion 0mm ca'sing'l concentric with the openits T is c 8. s ip ne h u the lower wall thereof encompassed by a side M1119.

A ee-sue. mtasreasin o is seated at a 12 to the fabric strap 3 at that point adjacent the clamping member 6.

A coiled spring angular in cross section and lying entirely free of the strap 3 is disposed concentric with the strap. This spring is indicated at 13. The spring 13 is arranged to bear upon the inner wall of the tubular member 10 so as to hold the member 10 out of engagement with the strap 3 and thereby avoid unnecessary friction when the strap 3 is moved as by an upward or downward movement of the axle housing 5.

From the foregoing description of the various parts of the device, the operation theregagement with the strap, and thereby permit free movement of the strap. The connection between the collar 11, the strap 3, and the telescopic casing 10 is dust-proof as is the connection between the cap, Sand the casing 1, and the cap 8 with the tubular member 10. Therefore the presence of dust, mud, and other extraneous substances in the casing 1 isentirely precluded, so that the parts within the casing are not subjected to abnormal wear, as would be the case if sand 'or grit from the road should find its way within the casing 10. The upper end ofthe casing 10 merges with the cap 8 and formsa part thereof, while the lower end of the casing 10 merges with and forms a part of the collar 11.

This form of my invention operates in precisely the same manner as the preferred form, except that the member 10 slides within the member l0 as the strap 3 moves toward or away from the casing 1.

l i the strap Sis moved upwardly. This form In Figure 3 I have shown still another modified form of my invention, in which a fabric casing 14, is secured at its upper endto the side walls 9 ofthe cap 8, and the lower end 15 of the casing 14 is riveted directly tothe strap 3 by means of rivets16 in such a manner as to cause the lower end of the casing-to move upwardly within itself as V I of my invention also functions in precisely the same manner as the form shown in Figure 1.

I claim:

1. The combination with a shock absorber having a casing and a flexible strap extending exteriorly thereof and arranged for longitudinal movement toward or away from said casing when said shock absorber is in operation, of an extendible tubular flexible casing disposed concentric with said flexible strap and secured to said casing at one end, means for securing the opposite end of said tubular casing to said strap at a point adjacent to its lowermost end, and means within said tubular casing for main taining the inner walls of said casing out of engagement with said strap.

2. The combination with a shock absorber having a casing and a flexible strap extending exteriorly thereof and arranged for longitudinal movement toward or away from said casing when said shock absorber is in operation, of an extendible tubular flexible casing disposed concentric with said flexible strap and secured to said casing at one end, means for securing the opposite end of said tubular casing to said strap at a point adjacent to its lowermost end, and means within said tubular casing for maintaining the inner walls of said casing out of engagement'with said strap, there being a vsufficient portion of said strap extending beyond the lowermost end of said tubular casing to permit the strap to be secured to a portion of a motor vehicle adjacent to the shock absorber.

HENRY HAVELOOK LOGAN. 

